很多同事認爲filebeat採集日誌不能做到多行處理，今天這裏討論下filebeat的multiline與include_lines。
先來個案例，以下日誌，我們只要求採集error的字段，
2017/06/22 11:26:30 [error] 26067#0: *17918 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.32.17, server: localhost, request: "GET /wss/ HTTP/1.1", upstream: "http://192.168.12.106:8010/", host: "192.168.12.106" 2017/06/22 11:26:30 [info] 26067#0: 2017/06/22 12:05:10 [error] 26067#0: *17922 open() "/data/programs/nginx/html/ws" failed (2: No such file or directory), client: 192.168.32.17, server: localhost, request: "GET /ws HTTP/1.1", host: "192.168.12.106"
filebeat.yml文件配置如下：
filebeat.prospectors: - input_type: log paths: - /tmp/test.log include_lines: ['error'] output.kafka: enabled: true hosts: ["192.168.12.105:9092"] topic: logstash-errors-log
查看下kafka隊列
果然只有“error”關鍵字的日誌被採集了
{"@timestamp":"2017-06-23T08:57:25.227Z","beat":{"name":"192.168.12.106"},"input_type":"log","message":"2017/06/22 12:05:10 [error] 26067#0: *17922 open() /data/programs/nginx/html/ws failed (2: No such file or directory), client: 192.168.32.17, server: localhost, request: GET /ws HTTP/1.1, host: 192.168.12.106","offset":30926,"source":"/tmp/test.log","type":"log"}
{"@timestamp":"2017-06-23T08:57:32.228Z","beat":{"name":"192.168.12.106"},"input_type":"log","message":"2017/06/22 12:05:10 [error] 26067#0: *17922 open() /data/programs/nginx/html/ws failed (2: No such file or directory), client: 192.168.32.17, server: localhost, request: GET /ws HTTP/1.1, host: 192.168.12.106","offset":31342,"source":"/tmp/test.log","type":"log"}再來多行案例：
[2016-05-25 12:39:04,744][DEBUG][action.bulk ] [Set] [***][3] failed to execute bulk item (index) index {[***][***][***], source[{***}}
MapperParsingException[Field name [events.created] cannot contain '.']
at org.elasticsearch.index.mapper.object.ObjectMapper$TypeParser.parseProperties(ObjectMapper.java:273)
at org.elasticsearch.index.mapper.object.ObjectMapper$TypeParser.parseObjectOrDocumentTypeProperties(ObjectMapper.java:218)
at org.elasticsearch.index.mapper.object.ObjectMapper$TypeParser.parse(ObjectMapper.java:193)
at org.elasticsearch.index.mapper.object.ObjectMapper$TypeParser.parseProperties(ObjectMapper.java:305)
at org.elasticsearch.index.mapper.object.ObjectMapper$TypeParser.parseObjectOrDocumentTypeProperties(ObjectMapper.java:218)
at org.elasticsearch.index.mapper.object.RootObjectMapper$TypeParser.parse(RootObjectMapper.java:139)
at org.elasticsearch.index.mapper.DocumentMapperParser.parse(DocumentMapperParser.java:118)
at org.elasticsearch.index.mapper.DocumentMapperParser.parse(DocumentMapperParser.java:99)
at org.elasticsearch.index.mapper.MapperService.parse(MapperService.java:498)
at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.applyRequest(MetaDataMappingService.java:257)
at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.execute(MetaDataMappingService.java:230)
at org.elasticsearch.cluster.service.InternalClusterService.runTasksForExecutor(InternalClusterService.java:468)
at org.elasticsearch.cluster.service.InternalClusterService$UpdateTask.run(InternalClusterService.java:772)
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedEsThreadPoolExecutor.java:231)
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:194)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)filebeat.yml文件配置如下：
filebeat.prospectors: - input_type: log paths: - /tmp/test.log multiline: pattern: '^\[' negate: true match: after fields: beat.name: 192.168.12.106 fields_under_root: true output.kafka: enabled: true hosts: ["192.168.12.105:9092"] topic: logstash-errors-log
kafka隊列如下：
{"@timestamp":"2017-06-23T09:09:02.887Z","beat":{"name":"192.168.12.106"},"input_type":"log",
"message":"[2016-05-25 12:39:04,744][DEBUG][action.bulk ] [Set] [***][3] failed to execute bulk item (index) index {[***][***][***], source[{***}}\n
MapperParsingException[Field name [events.created] cannot contain '.']\n at org.elasticsearch.index.mapper.object.ObjectMapper$TypeParser.parseProperties(ObjectMapper.java:273)\n
at org.elasticsearch.index.mapper.object.ObjectMapper$TypeParser.parseObjectOrDocumentTypeProperties(ObjectMapper.java:218)\n
at org.elasticsearch.index.mapper.object.ObjectMapper$TypeParser.parse(ObjectMapper.java:193)\n
at org.elasticsearch.index.mapper.object.ObjectMapper$TypeParser.parseProperties(ObjectMapper.java:305)\n
at org.elasticsearch.index.mapper.object.ObjectMapper$TypeParser.parseObjectOrDocumentTypeProperties(ObjectMapper.java:218)\n
at org.elasticsearch.index.mapper.object.RootObjectMapper$TypeParser.parse(RootObjectMapper.java:139)\n
at org.elasticsearch.index.mapper.DocumentMapperParser.parse(DocumentMapperParser.java:118)\n
at org.elasticsearch.index.mapper.DocumentMapperParser.parse(DocumentMapperParser.java:99)\n
at org.elasticsearch.index.mapper.MapperService.parse(MapperService.java:498)\n
at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.applyRequest(MetaDataMappingService.java:257)\n
at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.execute(MetaDataMappingService.java:230)\n
at org.elasticsearch.cluster.service.InternalClusterService.runTasksForExecutor(InternalClusterService.java:468)\n
at org.elasticsearch.cluster.service.InternalClusterService$UpdateTask.run(InternalClusterService.java:772)\n
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedEsThreadPoolExecutor.java:231)\n
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:194)\n
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)\n
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)\n
at java.lang.Thread.run(Thread.java:745)\n\n\n\n","offset":35737,"source":"/tmp/test.log","type":"log"}可以看出multiline將多行日誌彙總。
multiline與include_lines，結合使用。
filebeat.yml文件配置如下：
filebeat.prospectors: - input_type: log paths: - /tmp/test.log include_lines: ['error'] multiline: pattern: '^\[' negate: true match: after output.kafka: enabled: true hosts: ["192.168.12.105:9092"] topic: logstash-errors-log
即日誌中如果有"error"關鍵字的日誌，進行多行合併，發送至kafka.
經驗證，在日誌不斷輸入的情況，會把不含"error"的行也進行合併，日誌有間隔的情況輸入，過濾效果比較好，具體結合業務情況實用吧。
總之一句話，filebeat可以多行合併和進行關鍵字日誌採集。